The effect of different surface treatments on the molten salt hot corrosion of IN-657 superalloy
The effect of different surface treatments on the molten salt hot corrosion of IN-657 superalloy
复制标题
DOI：
10.1016/0257-8972(96)02856-3
复制
发表时间：
1996-11
影响因子：
5.4
通讯作者：
E. Otero;A. Pardo;F. Pérez;J. F. Álvarez;M. Utrilla
中科院分区：
文献类型：
--
作者：
E. Otero;A. Pardo;F. Pérez;J. F. Álvarez;M. Utrilla
研究了不同表面处理（激光表面处理、氮化硅表面处理和25wt .% Al2(OH) 4si2o5 - 75wt .% Na2SiO3）对IN-657高温合金热腐蚀行为的影响。腐蚀试验是在氧化气氛中与82% K2S2O7-18% V2O5的熔融混合物接触进行的。分析了操作温度和碳渣作为熔液组分的影响。高岭土-甲基硅酸盐混合涂层效果最好。激光表面处理和cvd -氮化硅不建议用于IN-657高温合金的表面改性。考虑到所得到的结果，作者建议在平均温度和熔盐组成上，上述涂层可以令人满意地工作。
The influence of different surface treatments (laser surface treatment, silicon nitride, and 25 wt.% Al2(OH)4Si2O5—75 wt.% Na2SiO3), on the hot corrosion behaviour of IN-657 superalloy has been studied. The corrosion tests were performed in an oxidizing atmosphere in contact with a molten mixture of 82% K2S2O7—18% V2O5. The effects of operation temperature and carbon residues as component of the molten mixture were also analyzed. The best results were obtained for the kaolin and methasilicate mixture coating. Laser surface treatment and the CVD-silicon nitride are not recommended for surface modification of the IN-657 superalloy. Taking into account the results obtained, the authors suggest the average temperature and molten salt compositions where the above coating can work satisfactorily.